5 4 3 2 1 OPTIONAL CIRCUIT C1 D OPT 1206 VIN 10V ‐ 48V D1 D2 OPT D OPT C2 OPT 2220 R2 OPT 1206 L1 330µH Sumida CDRH8D43RT125NP‐331MC E1 GND E2 R3 1M C C3 10µF 50V 1206 C 1 EN/UVLO E5 INTVCC R12 215K 1% 3 7 VIN BIAS UVLO SW SW U1 LT8331EMSE R13 0 FBX 12 SYNC E3 R6 (Opt) B C6 0.22µF 10 14 R8 154k 1% VOUT C4 1µF 250V 2220 C5 1µF 250V 2220 E6 C7 1µF R7 13.3K 1% * 17 E4 VIN IOUT 10V 25mA 12V 30mA 24V 55mA 36V 70mA 48V 80mA CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; TECHNOLOGY HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED TITLE: SCHEMATIC CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 1. ALL RESISTORS 0630. ALL CAPACITORS 0603. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 5 4 GND B GND NOTE: UNLESS OTHERWISE SPECIFIED * 0805 GND A 120V 1M 0805 4.7pF C8 INTVCC 6 NC 8 NC E7 R5 5 SS RT BAV21W‐7‐F 9 SYNC INTVCC 11 D3 16 3 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only A HIGH VOLTAGE, 0.5A BOOST / FLYBACK / SEPIC INVERTING CONVERTER SIZE IC NO. REV. LT8331EMSE N/A 2 DEMO CIRCUIT 2275A DATE: SHEET Tuesday, September 01, 2015 2 1 1 OF 1